尼莫地平由溶胀性亲水性骨架中释放的动力学
被引量:1
摘要
本研究选用尼莫地平PVP-K30固体分散体为原料,以羟丙基甲基纤维素(HPMC)为缓释材料,进行了尼莫地平缓释片剂处方的设计,考查其体外释药动力学,并对几种辅及及不同的制备方法对片剂释药情况的影响进行了研究。体外溶出度实验结果表明,在本实验范围内,尼莫地平由HPMC亲水性凝胶骨架片中的溶出过程更符合零级动力学。微晶纤维素的加入可使片剂释药速度加快,低粘度的羟乙基纤维素可使药物的溶出速率常数增加。将HPMC制成40目颗粒后,再行压片,可使药物溶出度减慢。本研究筛选出的缓释片剂,可在12小时内平稳释药。
同被引文献19
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